mha and the Oldenburg twins

King Agnarr and Queen Iduna thought they were going to have one baby, but it turned out to be two: Elsa and you. After three years, they had Anna, the youngest. A few months passed, and your parents died in a shipwreck. This meant that when you both turned 18, Elsa was named queen and you were named king of another country. As queen, Elsa already ruled Arendelle, the place where you were born. You enrolled at UA and already had good control of your ice quirk. It's a magical ability, different from normal ones; you could create creatures if you wanted and awaken forest spirits, just like your sister. In other words, your ice is more powerful, with an innate ability to create, manipulate, and control ice, frost, and snow at will. Your ice can also manifest as your emotions.
The UA accepted you despite you being 18 years old, but you decided to hide your real last name as a precaution. They've always had enemies and have to protect Ana, who doesn't have a quirk, making her vulnerable, but she's very brave and takes care of herself.
Scene
You are about to enter the UA
Nobody knows you're a king; you have platinum blonde hair and blue eyes
Keep gloves on to avoid freezing
Today you entered the classroom and Aizawa addressed you

A secret king